Mary Catherine McCormack is an American actress. She has had leading roles as Justine Appleton on the series Murder One (1995–1997), as Deputy National Security Adviser Kate Harper on The West Wing (2004–2006), as Deputy U.S. Marshal Mary Shannon on In Plain Sight (2008–2012), and as Peggy on the comedy series The Kids Are Alright (2018–2019).
★ 6 Vicious 2025
Mother Serie ★ 8.7 The Pitt 2025
Dr. Linda Conley Serie ★ 7.4 Heels 2021
Willie Day ★ 6.8 Unpregnant 2020
Debra Clarke ★ 5.5 Treehouse 2019
Lilith Serie ★ 7.6 The L Word : Generation Q 2019
Anne Finley Serie ★ 6.8 The Kids Are Alright 2018
Peggy Cleary Serie ★ 7.2 For the People 2018
Chloe Daniels ★ 4.5 The Crash 2017
Sarah Schwab ★ 5.3 Drone 2017
Ellen ★ 5.4 Alien Code 2017
Rebecca Serie ★ 6.4 Loaded 2017
Casey Serie ★ 7.5 Will & Grace 2017
Janet ★ 5.3 A Country Called Home 2016
Amanda Serie ★ 5.4 Chelsea Does 2016
Herself Serie ★ 5.1 Chelsea 2016
Self Serie ★ 6.5 Divorce 2016
Kathy DeSantis Serie ★ 6.4 Angie Tribeca 2016
Abigail Liukin Serie ★ 6.4 Match Game 2016
Self - Panelist ★ 7.3 Scooby-Doo ! et la folie du catch 2014
Ms. Richards (voice) ★ 6.7 Dans l'enfer de la polygamie 2013
Leann Serie ★ 6.6 House of Lies 2012
Denna Altshuler Serie ★ 7.2 Scandal 2012
Lisa Elliot Serie ★ 8.1 The Newsroom 2012
Molly Levy Serie ★ 4.9 Watch What Happens Live with Andy Cohen 2009
Self - Guest Serie ★ 5.9 Late Night with Jimmy Fallon 2009
Self Serie ★ 7 U.S. Marshals, Protection de témoins 2008
Mary Shannon ★ 6.7 Chambre 1408 2007
Lilly Enslin ★ 5.9 Los Angeles : Alerte maximum 2006
Lexi ★ 5.8 For Your Consideration 2006
Pilgrim Woman ★ 5.8 Madison 2005
Bonnie McCormick Serie ★ 6.8 The Late Late Show with Craig Ferguson 2005
Self ★ 5.1 Dickie Roberts : Ex-enfant star 2003
Grace Finney Serie ★ 5.6 The Ellen DeGeneres Show 2003
Self Serie ★ 5.3 Jimmy Kimmel Live! 2003
Self ★ 4.6 Full Frontal 2002
Linda ★ 4.1 World Traveler 2002
Margaret ★ 7.2 K-Pax, l'homme qui vient de loin 2001
Rachel Powell ★ 6.1 Rouge à lèvres et arme à feu 2001
Frances Serie ★ 7.6 New York Section Criminelle 2001
Mary Shannon ★ 6.3 Le Club des cœurs brisés 2000
Anne ★ 5.2 Mafia Parano 2000
Gloria Nesstra ★ 5.9 The Big Tease 1999
Monique ★ 6.3 Mystery, Alaska 1999
Donna Biebe ★ 6.5 Jugé coupable 1999
Michelle Ziegler Serie ★ 8.3 À la Maison Blanche 1999
Kate Harper ★ 6.2 Deep Impact 1998
Andrea Baker ★ 5.9 Studio 54 1998
New Year's Eve Wife (uncredited) ★ 4.5 The Alarmist 1998
Sally ★ 6.5 Parties intimes 1997
Alison Stern ★ 5.5 Drôles de Pères 1997
Virginia Farrell (uncredited) Serie ★ 7.7 Murder one : L'affaire Rooney 1995
Justine Appleton ★ 6.8 Miracle sur la 34e rue 1994
Myrna Foy Serie ★ 7.8 Urgences 1994
Debbie Serie ★ 5.4 The Tonight Show with Jay Leno 1992
Serie ★ 7.3 New York Police Judiciaire 1990
Rickie the Bartender 
